#include<iostream>
#include<cstdlib>
#include<unistd.h>
#include<strings.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>

using namespace std;

void Usage(std::string proc)
{
    std::cout << "\n\rUsage: " << proc << " serverip serverport\t" << std::endl; 
}

int main(int argc, char *argv[])
{
    if(argc != 3)
    {
        Usage(argv[0]);
        exit(0); 
    }
    std::string serverip = argv[1];
    uint16_t serverport = std::stoi(argv[2]);

    struct sockaddr_in server;
    bzero(&server, sizeof(server));
    server.sin_family = AF_INET;
    server.sin_port = htons(serverport);
    server.sin_addr.s_addr = inet_addr(serverip.c_str());
    socklen_t len = sizeof(server); 

    int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if(sockfd < 0)
    {
        cout << "socket error" << endl;
        return 1; 
    }

    string message;
    char buffer[1024];
    while(true)
    {
        cout << "Please Enter@ ";
        getline(cin, message);

        sendto(sockfd, message.c_str(), message.size(), 0 , (struct sockaddr*)&server, len);
        struct sockaddr_in temp;
        socklen_t len = sizeof(temp); 

        ssize_t s = recvfrom(sockfd, buffer, 1023, 0, (struct sockaddr*)&temp, &len);
        if(s > 0)
        {
            buffer[s] = 0;
            cout << buffer << endl; 
        }
    }
    close(sockfd);
    return 0; 
}

